scholarly journals A new anomaly-free flipped 341 model

2021 ◽  
pp. 2150101
Author(s):  
M. Djouala ◽  
N. Mebarki ◽  
H. Aissaoui
Keyword(s):  
Experimental Data ◽  
Rare Decay ◽  
Branching Ratios ◽  
Tree Level ◽  
Recent Experimental Data ◽  
Decay Modes ◽  
Fermion Masses ◽  
Mixing Matrix ◽  
Text Model ◽  
Gauge Anomalies

A new flipped [Formula: see text] model without exotic electric charges is proposed. All the quark families are arranged in the same representation while lepton generations are in different representations leading to a tree level FCNC. Moreover, it is shown that the cancellation of the triangle gauge anomalies requires new additional leptons a 10-plet and a quadruplet. All fermion masses have been also discussed. Furthermore, using the most recent experimental data of the branching ratios of [Formula: see text] and [Formula: see text] rare decay modes, stringent bounds on the heavy neutral bosons masses and the muon-electron mixing matrix element are obtained.

B − L extension of the Standard Model based on Σ(18) symmetry for fermion mass and mixing

2020 ◽  
Vol 35 (27) ◽  
pp. 2050223
Author(s):  
V. V. Vien
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Neutrino Mass ◽  
Tree Level ◽  
Fermion Mass ◽  
Recent Experimental Data ◽  
Type I ◽  
Quark Masses ◽  
The Standard Model ◽  
Experimental Values

In this work, we suggest a renormalizable [Formula: see text] extension of the Standard Model with [Formula: see text] symmetry in which the observed fermion mass and mixing pattern is consistent with the experimental values given in Ref. 1 at the tree-level. The neutrino mass ordering and the tiny neutrino masses are induced by the type-I seesaw mechanism. The effective neutrino mass parameters are predicted to be [Formula: see text], [Formula: see text] for NO and [Formula: see text], [Formula: see text] for IO which are well consistent with the recent experimental data. The quark masses are in good agreement while the quark mixing matrix has a little difference with the experimental data taken from Ref. 1 and the Cabibbo angle [Formula: see text] is related to the model parameter [Formula: see text] by the formula [Formula: see text].

THE ETA-MESON PHOTOPRODUCTION ON PROTON

2011 ◽  
Vol 26 (03n04) ◽  
pp. 645-646
Author(s):  
JAN DONOVAL ◽  
PETR BYDŽOVSKÝ
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Cross Sections ◽  
Form Factors ◽  
Coupling Constants ◽  
Tree Level ◽  
Recent Experimental Data ◽  
Model Coupling ◽  
Eta Meson ◽  
Meson Photoproduction

We have performed the tree-level calculations of the eta meson photoproduction on proton for photon laboratory energies between 714 and 1500 MeV. The resonances N (1535), N (1710), N (1650), N (1440) and N (1520) were assumed. The form factors were introduced in the hadron vertices to involve the structure of hadrons. The influence of various form factor recipes was investigated. In order to keep gauge invariance, the appropriate contact term was introduced. The parameters of our model (coupling constants, cutoffs) were fitted to recent experimental data of the cross sections and some polarization observables.

scholarly journals Recent developments on the CKM matrix

2014 ◽  
Vol 29 (20) ◽  
pp. 1430040 ◽  
Author(s):  
Wei Wang
Keyword(s):  
Experimental Data ◽  
Cp Violation ◽  
Standard Model ◽  
Recent Experimental Data ◽  
Experimental Measurements ◽  
Complex Phase ◽  
Ckm Matrix ◽  
Recent Developments ◽  
Mixing Matrix ◽  
Theoretical Developments

In Standard Model, CP violation arises from an irreducible complex phase in the quark mixing matrix, now under the name Cabibbo–Kobayashi–Maskawa matrix. This description has shown remarkable overall agreement with various experimental measurements. In this review, we discuss recent experimental data and theoretical developments on three quantities of CKM matrix that are most uncertain: the Vub, including its magnitude and the phase γ in standard parametrization, and the [Formula: see text] mixing phase βs.

Fusion and Breakup Reactions of 17S + 208Pb and 15C + 232ThHalo Nuclei Systems

2015 ◽  
Vol 11 (2) ◽  
pp. 2972-2978
Author(s):  
Fouad A. Majeed ◽  
Yousif A. Abdul-Hussien
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Fusion Reaction ◽  
Fusion Cross Section ◽  
Reaction Cross ◽  
Recent Experimental Data ◽  
Barrier Distribution ◽  
Coupled Channel ◽  
Total Fusion ◽  
Full Quantum

In this study the calculations of the total fusion reaction cross section have been performed for fusion reaction systems 17F + 208Pb and 15C + 232Th which involving halo nuclei by using a semiclassical approach.The semiclassical treatment is comprising the WKB approximation to describe the relative motion between target and projectile nuclei, and Continuum Discretized Coupled Channel (CDCC) method to describe the intrinsic motion for both target and projectile nuclei. For the same of comparsion a full quantum mechanical clacualtions have been preforemd using the (CCFULL) code. Our theorticalrestuls are compared with the full quantum mechaincialcalcuations and with the recent experimental data for the total fusion reaction  checking the stability of the distancesThe coupled channel calculations of the total fusion cross section σfus, and the fusion barrier distribution Dfus. The comparsion with experiment proves that the semiclassiacl approach adopted in the present work reproduce the experimental data better that the full quantal mechanical calcautions. 

Note on possible rare decay modes for elementary particles

1960 ◽  
Vol 15 (6) ◽  
pp. 934-936 ◽  
Author(s):  
E. Galzenati ◽  
M. Marinaro ◽  
S. Okubo
Keyword(s):  
Rare Decay ◽  
Elementary Particles ◽  
Decay Modes
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